What does he mean? Is he interested or not?

I've been dating this guy for about seven months he says to me all the time that I'm different and he's been saying lately that I scare him what does he mean when he says that I scare him? I also feel like he's been trying to push me away by telling me that I should step up my game what does he mean by this? I feel like it's two contradicting statements what does he mean by this?